How to test for a blown head gasket on a Jeep Wrangler?
How to test for a blown head gasket on a Jeep Wrangler? OK, if the prior 3 tests have confirmed that the head gasket on your Jeep 4.0L Cherokee (or Grand Cherokee, Wrangler) is not blown YET your 4.0L Jeep is still overheating and you still suspect a blown head gasket, take a look at the last test: HEAD GASKET TEST 4: Using A Chemical Block Tester (Combustion Leak Tester). What are the symptoms of a blown head gasket? The most common symptoms a blown head gasket are: Your Jeep is overheating. White smoke is coming out of the tail-pipe...